Road-roller.



H. F. GRAND ALL.

110111) ROLLER. APPLICATION FILED JAN. 9| 19 11.

Patnted M112, 1911.

0., WASHINGTON, '11 c.

UNTTED STATES PATENT OFFICE.

HENRY F. CRANDALL, OF RACINE, WISCONSIN, ASSIGNOB. T0 J". I. CASE THRESHING MACHINE COMPANY, OF RAGINE, WISCONSIN, A CORPORATION.

ROAD-ROLLER.

To aZZ whom it may concern:

Be it known that I, HENRY F. GRANDALL, a citizen of the United States, and a resident of Racine, county of Racine, and State of Wisconsin, have invented certain new and useful Improvements in Road-Rollers, of which the following is a description.

The invention relates to road rollers and more particularly to means for securing suitable spikes or picks Within seats on the rim of the roller.

The improvement seeks to provide simple and effective means for securely holding the spikes in position and for preventing them from wearing loose in their seats, but which permits the ready removal of the spikes or picks and the substitution therefor of suitable plugs.

The nature of the invention will appear from the following description and being more particularly pointed out by the ap pended claims.

In the accompanying drawing, which illustrates a preferred form of the present invention, Figure 1 is a view in elevation of a portion of the roll or wheel of a road roller with the spikes or picks mounted in position thereon. Fig. 2 is a detail view on an en larged scale illustrating a portion of the wheel rim and one of the spikes or picks held in position thereon. Fig. 3 is a detail section showing a plug held in position in one of the seats of the wheel rim. Fig. 4: is a section on the line l4: of Fig. 2. Fig. 5 is a detail section on line 55 of Fig. 1.

The roller, a portion of which is illustrated in Fig. 1, comprises a rim 1, a hub 2 and spokes3. These parts are formed of iron or steel and the rim 1 is provided, at suitable intervals, with tapered openings or seats l adapted to receive shanks of a set of removable spike teeth 5. To afford a long bearing for the shanks of the spike teeth 5, reinforcements 6 are secured upon the inner face of the wheel or roller rim 1 by rivets 7 and the tapering conical seats 1 extend through the rim and through the raised cen tral portions 8 of the reinforcements. The reinforcements are conveniently formed of drop forgings and preferably the seats 4. that extend through the rim and through the reinforcements, are reamed to a true conical taper after the reinforcements have been riveted in position. The metal spike teeth 5 are provided with turned tapered shanks 9 Specification of Letters Patent.

Application filed January 9, 1911.

Patented May 2, 1911.

Serial No. 601,619.

which snugly fit Within the seats l while their outer portions project beyond the tread of the rim to tear up or disintegrate the old road bed over which the roller travels.

In operation the spike teeth 5 are subjected to great strains and are driven into the seats so that ordinary fastening devices, such as nuts or keys applied to the inner ends of the spikes, require frequent tightening to prevent the spikes from working loose and thus wearing and unduly enlarging the seats in the wheel rim. Moreover, with such fastening devices as are usually employed, the spikes can not be readily interchanged with the plugs 10 (see Fig. 8), which are placed in the seats 4 when the roller is used for its ordinary work. To avoid these difficulties, spring keepers 11 for the spikes are provided which automatically take up any wear between the shanks of the spikes and the seats in the wheel rim and which releasably or detachably engage the inner ends of the spikes and plugs 10, so that the spikes and plugs may be readily removed and interchanged.

The spring keepers 11 are preferably U- shaped and are interposed between the wheel rim and suitable seats or shoulders on the inner ends of the spike shanks. The spring keepers 11 are preferably held in place upon the inner face of the wheel rim by the reinforcements 6. For this purpose, the outer faces of the reinforcements are provided with transverse grooves 12 through which the outer members 13 of the U-shaped keepers extend, these outer members being provided with offset portions 14 and 15 on opposite sides of the reinforcements to prevent the displacement of the keepers.

The inner ends of the spike shanks and of the plugs 9 are grooved to form annular shoulders or seats 16 which are adapted to be engaged by the inner legs or members 17 of the U-shaped spring keepers to hold the spike teeth or plugs against displacement. When the inner members 17 are thus engaged with the shoulders 16 of the spike teeth or plugs, the spring keepers are compressed and serve to hold the spike teeth or plugs against displacement. They also serve to automatically take up any wear on the seats 1 due to strains brought on the spike teeth and thus prevent the teeth from working loose or unduly wearing or enlarging the seats. The spring keepers may be readily shifted by hand into or out of engagement with the spike teeth or plugs so that the latter may be very easily removed and interchanged.

Preferably, the keepers are so disposed that when in engagement with the shoulders 16, they occupy an inclined position relative to the spike teeth or plugs, so that they cannot be accidentally disengaged therefrom. As a further protection against the accidental disengagement of the keepers, the offsets on the lower members thereofcan be arranged to engage the inner faces of the wheel rim, as shown, so that a slight torsional stress is placed upon the spring keepers to prevent the accidental disengagement or movement of the outer members 17 away from the seats or shoulders 16 of the spikes and plugs.

It is obvious that-changes may be made in the details set forth without departure from the essentials of the invention, as defined in the claims.

' I claim as my invention '1. In road rollers, the combination of the roller rim having tapered seats at suitable intervals extending therethrough, removable spike teeth having tapered shanks fitting said seats, and spring keepers detachably engaging the inner ends of said spike teeth.

'2. In road rollers, the combination of the roller rim having tapered seats at suitable intervals extending therethrough, removable spike teeth having tapered shanks fitting said seats and provided with shoulders at 7 annular shoulders.

4. In road rollers, the combination ofthe roller rim having tapered seats at suitable intervals extending therethrough, removable spike teeth having tapered shanks fitting said seats and provided with shoulders at their iimer ends and U-shaped spring keepers secured to the inner face of said rim and arranged to detachably engage said shoulders.

5. In road rollers, the combination of the roller rim having tapered seats at suitable intervals extending therethrough, removable spike teeth having tapered shanks fitting said seats and provided with shoulders at their inner ends, and U-shaped spring keepers having their outer members secured to the inner faces of said rim and their inner members arranged to detachably engage said shoulders, said keepers being arranged in inclined position when in engagement with said shoulders.

6. In road rollers, the combination of the roller rim having tapered seats at suitable intervals extending therethrough, removable spike teeth having tapered shanks fitting said seats and provided with shoulders at their inner ends, and U-shaped spring keepers having their outer members secured to the inner faces of said rim and their inner members arranged to detachably engage said shoulders, the lower members of said keepers having ofiset portions for resisting the movement of the keepers away from spike teeth. 7

7. In road rollers, the combination of the roller rim having reinforcements secured to its inner face and tapered seats extending through said rim and said reinforcements, removable spike teeth having tapered shanks fitting said seats and provided with shoulders at their inner ends, and spring keepers for said' spike teeth held in place by said reinforcements and arranged to detachably engage the shoulders at the inner ends of said spike teeth.

HENRY F. GRANDALL.

Witnesses:

VVM. F. SAWYER, N. V. CorLnN.

I Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G. 

